Pump.



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Specification of Letters Patent. i atgnted De 14 1915 Appli a on ledJune 1 .3.- F al NR- 7 3.58%-

To all whom it may concern;

Be it known that 1, JOHN N, CHILDS, a citizen of the United States,residing at Hazleton, county of'LuZerne, and State of Pennsylvania, haveinvented certain new and useful Improvements in Pumps, fully describedand represented in the following specification and the accompanyingdrawings, forming a part of the same.

This invention relates to an improved pump construction, and especiallyto an improved arrangement of cylinder lining or piston sleeve and meansfor holding it in place, by which the size of the pump is reduced and acheaper and better construction secured.

The usual practice in pumps employing piston sleeves separate from theother parts of the pump ha been to hold h se in Pla y an end flange ltedto th barrel as ng- This flange extending outside the cylinder borenecessarily increases the size of the end plunger chamber and, in thatclass of pumps employing suction a d discharge valves on opposite sidesof the chamber, re:

quires that the suction valves be lowered and discharge valves raisedbeyond what other wise would be necessary. The opening at the end of theplunger chamber, also, must be large enough to remove the flange, thusincreasing the size of this opening and its cover beyond what would benecessary for a plain sleeve, which correspondingly raises the dischargevalves and lowers the suction valves. This use of the end flange, there:fore, increases largely the height and weight of the barrel. I avoid theabove objections to the flanged sleeve, and greatly reduce the weight ofthis type of pump and its cost by the present construction, in which thepiston sleeve has no end flange, but is held in place by a clamping ringset into a groove in the outside of the piston sleeve and secured inplace, preferably by bolting the clamping ring between flanges on thefront and rear barrels, in that type of pumps in which such separate endbarrels are used. The clamping ring is preferably split so that it maybe tightened on the sleeve and may be put in place and removed withoutremoving the end barrel.

In the accompanying drawings forming a part of this specification, theinvention is illustrated as applied in its preferred form to a pump ofcommon type and this construction will now be described in detail and te features forming the invention then Specif cally pointed out inclaims.

In the dr wing, Figure 1 is a vertical, central longitudinal section ofthe pump. Fig. 2 is the cross section on line 2 of Fig. 1.

Referring to the drawing, in which the pump shown is of the well-knowntype of ma li ht u p u d p c a y for P ping oil on shipboard or oilbarges, and formed of front and rear barrels, each car ryin a singlebottom suction valve and a sing hop discharge valve; A is the frontplunger chamber, B the rear plunger chamher, a suction valves, Z) thedischarge valves, C the suction chambers, D the discharge chambers, thesuction main, F the discharge main, the piston or plunger, and H theplunger rod. The barrels are formed with the usual flanged sleeves 10,by which the plunger cylinder is formed between the barrels, and, inaccordance with the present invention, the piston or )lunger sleeve c isa plain sleeve, withoi lt .ange, and secured in place by a split ortwo-part ring d entering ,a groove 1 formed in the outside of thesleeve, the two parts of the clamping ring (5 being shown as securedtogether by bolts 2, and the barrel flanges being bolted together with 1between them by bolts 3 passing ll ll h th arr fla an i h suction anddischarge valves a, b, are shown as of the common type, with the valvesheld in place by .crabs 4 on valve stems 5 so as to be readilyremovable, the usual openings and caps 7 at the tops of the barrelsbeing provided for the removal of the discharge valves.

It will be seen that, in the construction shown, the inner diameter ofthe rear plunger chamber and the rear opening need be no larger than isnecessary for the pump cylinder and piston sleeve of the size required,so that the suction valves may be raised and the discharge valveslowered, and brought nearer the pump cylinder, it being unnecessary toprovide a chamber and opening of the increased size necessary toaccommodate the usual flange extending outside the piston sleeve. Thisnot only reduces greatly the weight of the pump barrel and cost ofmaterial, but also it does away with the machining for the sleeve flangewhich is a very long and expensive.

operation of boring, and with drilling, tapping, studding, etc. Theraising of the suction valve to approximately the level of the cylinderbore, also, secures increased efficiency and enables the pump to be madesomewhat smaller, as the fluid handled is discharged through the suctionvalve directly into the large chamber space opposite the cylinder,instead of into spaces around the valve below the flange as in the oldflanged sleeve construction.

It will be understood that the broader features of the invention are notlimited to a pump of the special type shown, but are applicablegenerally in pump constructions employing piston sleeves. For instance,in some types of pump, it is the custom to insert bronze or other metalsleeves under hydraulic or similar pressure, and renewal of such sleevesrequires that they be cut out and thus destroyed, while the presentinvention provides for the cheap and convenient substitution of a newsleeve when necessary. While the split clamping ring and grooved pistonsleeve is the preferred means of holding the piston sleeve in place,especially in pumps of the type shown, it will be understood that theinvention, considered broadly,

includes other means for removably secur-' ing the piston sleeve inplace.

What is claimed is:

1. A pump having a cylinder provided and drawn out without moving thecylinder endwise.

2. A pump having its cylinder divided transversely, and having a pistonsleeve forming a lining for the cylinder and secured in place by a splitclamping ring engaging the exterior of the piston sleeve and detachablyheld in place between the two parts of the pump cylinder, said ringbeing free to be removed transversely to the sleeve between the parts ofthe cylinder by. detaching the holding device without moving either partof the pump cylinder.

3. A pump having an end chamber provided with a rear opening, suctionand discharge valves on opposite sides of said chamber, a pump cylinderextending from the chamber on the side opposite and in line with therear opening, a removable piston sleeve forming a lining for thecylinder and adapted to be drawn outward through the end chamber andrear opening, and a clamping device engaging the exterior of said sleevebetween its ends for holding the sleeve in place, said clamping devicebeing removable transversely to the sleeve to release the sleeve for itswithdrawal without moving the pump cylinder.

4. A pump having end barrels provided with flanged extensions forming atrans versely divided cylinder, suction and force valves on oppositesides of the plunger chambers, piston sleeve 0 having exterior groove 1,and split clamping ring (Z entering said groove and bolted in placebetween the flanges of the pump barrels.

In testimony whereof, I have hereunto set my hand, in the presence oftwo subscribing witnesses.

JOHN N. CHILDS. Witnesses:

N. R. BUTLER, T. A. CORRIGAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

